Chilkat Online Tools

ExecuteStatement delphiDll Example

Amazon Redshift Data API

var
rest: HCkRest;
success: Boolean;
authAws: HCkAuthAws;
json: HCkJsonObject;
sbRequestBody: HCkStringBuilder;
sbResponseBody: HCkStringBuilder;
respStatusCode: Integer;
jResp: HCkJsonObject;
ClusterIdentifier: PWideChar;
CreatedAt: Integer;
Database: PWideChar;
DbUser: PWideChar;
Id: PWideChar;
SecretArn: PWideChar;

begin
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

rest := CkRest_Create();

authAws := CkAuthAws_Create();
CkAuthAws_putAccessKey(authAws,'AWS_ACCESS_KEY');
CkAuthAws_putSecretKey(authAws,'AWS_SECRET_KEY');

// Don't forget to change the region to your particular region. (Also make the same change in the call to Connect below.)
CkAuthAws_putRegion(authAws,'us-west-2');
CkAuthAws_putServiceName(authAws,'redshift-data');
// SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
CkRest_SetAuthAws(rest,authAws);

// URL: https://redshift-data.us-west-2.amazonaws.com/
// Use the same region as specified above.
success := CkRest_Connect(rest,'redshift-data.us-west-2.amazonaws.com',443,True,True);
if (success <> True) then
  begin
    Memo1.Lines.Add('ConnectFailReason: ' + IntToStr(CkRest_getConnectFailReason(rest)));
    Memo1.Lines.Add(CkRest__lastErrorText(rest));
    Exit;
  end;

// The following code creates the JSON request body.
// The JSON created by this code is shown below.

// Use this online tool to generate code from sample JSON:
// Generate Code to Create JSON

json := CkJsonObject_Create();
CkJsonObject_UpdateString(json,'ClusterIdentifier','string');
CkJsonObject_UpdateString(json,'Database','string');
CkJsonObject_UpdateString(json,'DbUser','string');
CkJsonObject_UpdateString(json,'Parameters[0].name','string');
CkJsonObject_UpdateString(json,'Parameters[0].value','string');
CkJsonObject_UpdateString(json,'SecretArn','string');
CkJsonObject_UpdateString(json,'Sql','string');
CkJsonObject_UpdateString(json,'StatementName','string');
CkJsonObject_UpdateInt(json,'WithEvent',123);

// The JSON request body created by the above code:

// {
//   "ClusterIdentifier": "string",
//   "Database": "string",
//   "DbUser": "string",
//   "Parameters": [
//     {
//       "name": "string",
//       "value": "string"
//     }
//   ],
//   "SecretArn": "string",
//   "Sql": "string",
//   "StatementName": "string",
//   "WithEvent": boolean
// }

CkRest_AddHeader(rest,'Content-Type','application/x-amz-json-1.1');
CkRest_AddHeader(rest,'X-Amz-Target','RedshiftData.ExecuteStatement');

sbRequestBody := CkStringBuilder_Create();
CkJsonObject_EmitSb(json,sbRequestBody);
sbResponseBody := CkStringBuilder_Create();
success := CkRest_FullRequestSb(rest,'POST','/',sbRequestBody,sbResponseBody);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkRest__lastErrorText(rest));
    Exit;
  end;
respStatusCode := CkRest_getResponseStatusCode(rest);
Memo1.Lines.Add('response status code = ' + IntToStr(respStatusCode));
if (respStatusCode <> 200) then
  begin
    Memo1.Lines.Add('Response Header:');
    Memo1.Lines.Add(CkRest__responseHeader(rest));
    Memo1.Lines.Add('Response Body:');
    Memo1.Lines.Add(CkStringBuilder__getAsString(sbResponseBody));
    Exit;
  end;

jResp := CkJsonObject_Create();
CkJsonObject_LoadSb(jResp,sbResponseBody);

// The following code parses the JSON response.
// A sample JSON response is shown below the sample code.

// Use this online tool to generate parsing code from sample JSON:
// Generate Parsing Code from JSON

ClusterIdentifier := CkJsonObject__stringOf(jResp,'ClusterIdentifier');
CreatedAt := CkJsonObject_IntOf(jResp,'CreatedAt');
Database := CkJsonObject__stringOf(jResp,'Database');
DbUser := CkJsonObject__stringOf(jResp,'DbUser');
Id := CkJsonObject__stringOf(jResp,'Id');
SecretArn := CkJsonObject__stringOf(jResp,'SecretArn');

// A sample JSON response body parsed by the above code:

// {
//   "ClusterIdentifier": "string",
//   "CreatedAt": number,
//   "Database": "string",
//   "DbUser": "string",
//   "Id": "string",
//   "SecretArn": "string"
// }

CkRest_Dispose(rest);
CkAuthAws_Dispose(authAws);
CkJsonObject_Dispose(json);
CkStringBuilder_Dispose(sbRequestBody);
CkStringBuilder_Dispose(sbResponseBody);
CkJsonObject_Dispose(jResp);